[vectorIntrinsics+mask] RFR: 8264563: Add masked vector intrinsics for binary/store operations [v2]

[Xiaohong Gong]

On Tue, 6 Apr 2021 22:28:37 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

>> Xiaohong Gong has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Revert changes of register allocation and new added mask IRs
>
> src/jdk.incubator.vector/share/classes/jdk/incubator/vector/X-Vector.java.template line 694:
> 
>> 692:                 $abstractvectortype$ hi = this.lanewise(LSHL, (op == ROR) ? neg : that);
>> 693:                 $abstractvectortype$ lo = this.lanewise(LSHR, (op == ROR) ? that : neg);
>> 694:                 return m != null ? blend(hi.lanewise(OR, lo), m) : hi.lanewise(OR, lo);
> 
> Checking for m!=null would cause boxing here.

Yeah, that's true. How about handling the difference separately in the masked/non-masked `lanewise` method?

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PR: https://git.openjdk.java.net/panama-vector/pull/57